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Re: what's that smell?

  • From: Allan Liska
  • Date: Mon Oct 07 19:41:49 2002

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Hello Jason,

Monday, October 7, 2002, 7:14:41 PM, you wrote:


JL> Hope this doesn't come across as DNS-101, but is there some way to tell
JL> what DNS server one uses?  Kinda like telnetting to port 80 or 25?  I
JL> know if it is possible, it's just as possible for them to change the
JL> output, but chances are the brainiacs of the world who don't filter
JL> probably aren't smart enough to change what their DNS server 'appears'
JL> to be either.

This will work:

dig @nameserver.tld chaos txt version.bind

For BIND nameservers, but it is not a standard convention so it is not
supported by all nameservers, and most administrators disable the
output from the command at this point:

datacenterwire.com /home/allan#dig @ns1.vbind.com chaos txt version.bind

; <<>> DiG 8.3 <<>> @ns1.vbind.com chaos txt version.bind
; (1 server found)
;; res options: init recurs defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 6
;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; QUERY SECTION:
;;      version.bind, type = TXT, class = CHAOS

;; ANSWER SECTION:
VERSION.BIND.           0S CHAOS TXT    "DNS, we aint got no stinkin DNS"

;; Total query time: 0 msec
;; FROM: datacenterwire.com to SERVER: ns1.vbind.com  66.150.201.103
;; WHEN: Mon Oct  7 17:37:39 2002
;; MSG SIZE  sent: 30  rcvd: 86


allan
- --
Allan Liska
allan@allan.org
http://www.allan.org

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